In situ construction of protonated g-C3N4/Ti3C2 MXene Schottky heterojunctions for efficient photocatalytic hydrogen production
In situ construction of protonated g-C3N4/Ti3C2 MXene Schottky heterojunctions for efficient photocatalytic hydrogen production
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DOI：
10.1016/s1872-2067(20)63559-8
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发表时间：
2021-01
影响因子：
16.5
通讯作者：
Haotian Xu;Rong Xiao;Jingran Huang;Yan Jiang;Cheng-Xiao Zhao;Xiaofei Yang
中科院分区：
文献类型：
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作者：
Haotian Xu;Rong Xiao;Jingran Huang;Yan Jiang;Cheng-Xiao Zhao;Xiaofei Yang
在半导体基光催化材料上将可持续太阳能转化为氢能，为化石燃料的消耗提供了一种替代方案。然而，高效光催化分解水以实现无碳氢气生产仍然是一个挑战。具有明确维度和完美匹配界面的异质结光催化剂有望实现高效的太阳能到氢的转化。本文报道了一种新型的具有强界面作用的质子化石墨化碳氮化物(PCN)/Ti3C2Mxene异质结的制备。与体相g-C3N4(393μ·g−1)和质子化g-C3N4(816μmoL·g−1)相比，二维PCN/2D Ti3C2Mxene界面异质结的析氢速率显著提高(2181μmoL·g−1)。PCN的电荷调节表面和面对面2D/2D肖特基异质结界面上的电荷加速输运是复合光催化剂优异析氢性能的主要原因。
Converting sustainable solar energy into hydrogen energy over semiconductor-based photocatalytic materials provides an alternative to fossil fuel consumption. However, efficient photocatalytic splitting of water to realize carbon-free hydrogen production remains a challenge. Heterojunction photocatalysts with well-defined dimensionality and perfectly matched interfaces are promising for achieving highly efficient solar-to-hydrogen conversion. Herein, we report the fabrication of a novel type of protonated graphitic carbon nitride (PCN)/Ti3C2MXene heterojunctions with strong interfacial interactions. As expected, the two-dimensional (2D) PCN/2D Ti3C2MXene interface heterojunction achieves a highly improved hydrogen evolution rate (2181 μmol·g−1) in comparison with bulk g-C3N4(393 μmol·g−1) and protonated g-C3N4(816 μmol·g−1). The charge-regulated surfaces of PCN and the accelerated charge transport at the face-to-face 2D/2D Schottky heterojunction interface are the major contributors to the excellent hydrogen evolution performance of the composite photocatalyst.